MAKORE Family: Scientific name(s):
Commercial restriction:
Sapotaceae (angiosperm) Tieghemella heckelii Tieghemelia heckeii Dumoria spp. (synonymous) no commercial restriction
WOOD DESCRIPTION
LOG DESCRIPTION
Color: red brown Sapwood: clearly demarcated Texture: medium Grain: straight or interlocked Interlocked Grain: marked but not frequent Note: Some logs are not floatable. Wood dark pink brown to dark red brown with sometime purplish glints and/or pale veins slightly distinct. Often moire.
Diameter: Thickness of Sapwood: Floats: Log Durability:
PHYSICAL PROPERTIES
MECHANICAL/ACOUSTIC
35 – 51 inches 1 – 3 inches yes good
Physical and mechanical properties are based on mature heartwood specimens. These properties can vary greatly depending on origin and growth conditions. Mean Std. Dev. Mean Std. Dev. Specific Gravity*: Crushing Strength*: 0.69 0.05 8,557 psi 1,450 psi Janka Hardness (lbs): Static Bending Strength*: 1,200 14,213 psi 2,465 psi Volumetric Shrinkage: Modulus of Elasticity*: 0.48% 0.05% 3,008,772 psi 276,732 psi Total Tangential Shrinkage (TS): 7.3% 0.5% Total Radial Shrinkage (RS): Musical Quality Factor: 92.5 measured at 2213 Hz 5.6% 0.6% TS/RS Ratio: 1.3 Fiber Saturation Point: 28% *At 12% moisture content. Stability: moderately stable to stable
NATURAL DURABILITY AND TREATABILITY Fungi and termite resistance refers to end-uses under temperate climate. Except for special comments on sapwood, natural durability is based on mature heartwood. Sapwood must always be considered as non-durable against wood degrading agents. E.N. = Euro Norm Funghi (According to E.N. standards): class 1 – very durable Dry Wood Borers: class D – durable (sapwood demarcated, risk limited to sapwood) Termites (According to E.N. standards): class D – durable Treatability (according to E.N. standards): class 4 – not permeable Use class ensured by natural durability: class 4 – in ground or fresh water contact Species covering the use class 5: yes Note: This species is listed in the European standard NF EN 350-2.
REQUIREMENT OF A PRESERVATIVE TREATMENT Against dry wood borer attacks: In case of risk of temporary humidification: In case of risk of permanent humidification:
Overseas Hardwoods Company
does not require any preservative treatment does not require any preservative treatment does not require any preservative treatment
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MAKORE
DRYING Drying Rate: normal Risk of Distortion: slight risk Risk of Casehardening: no Risk of Checking: slight risk Risk of Collapse: no Possible Drying Schedule: 2 Note: Initial surface drying prior to kiln drying is recommended in order to reduce defects.
M.C. (%) Green 104 86 68 59
Temperature (ยบF) Dry-Bulb Wet-Bulb 122 116.6 122 113 131 116.6 158 131 167 136.4
Air Humidity (%) 183.2 167 152.6 116.6 111.2
This schedule is given for information only and is applicable to thickness lower or equal to 1.5 in. It must be used in compliance with the code of practice. For thickness from 1.5 to 3 in, the air relative humidity should be increased by 5% at each step. For thickness over 3 in, a 10% increase should be considered.
SAWING AND MACHINING
ASSEMBLING
Blunting Effect: high Sawteeth Recommended: stellite tipped Cutting Tools: tungsten carbide Peeling: good Slicing: good Note: very irritant sawdust. Sometimes clogging of sawblades
Nailing / screwing: good but pre boring necessary Gluing: correct Note: tends to split when nailing. Gluing requires care.
END-USES
MAIN LOCAL NAMES
Sculpture Exterior paneling Cabinetwork (high class furniture) Flooring Musical instruments Exterior Joinery Light Carpentry Ship building (planking and deck) Industrial or heavy flooring Veneer for interior of plywood Interior Joinery Cooperage Sliced veneer Stairs (inside) Turned goods Tool handles Ship building (ribs) Vehicle or container flooring
Country Cameroon Ghana Gabon France/Germany
Overseas Hardwoods Company
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Local Name Nom adjap elang Abacu, Makore, Douka, Baku Douka Douka
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